1 /* $NetBSD: svc_auth_unix.c,v 1.13 1998/11/22 06:09:00 mrg Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: svc_auth_unix.c,v 1.13 1998/11/22 06:09:00 mrg Exp $"); 39 #endif 40 #endif 41 42 /* 43 * svc_auth_unix.c 44 * Handles UNIX flavor authentication parameters on the service side of rpc. 45 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 46 * _svcauth_unix does full blown unix style uid,gid+gids auth, 47 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 48 * Note: the shorthand has been gutted for efficiency. 49 * 50 * Copyright (C) 1984, Sun Microsystems, Inc. 51 */ 52 53 #include "namespace.h" 54 55 #include <stdio.h> 56 #include <string.h> 57 58 #include <rpc/rpc.h> 59 60 /* 61 * Unix longhand authenticator 62 */ 63 enum auth_stat 64 _svcauth_unix(rqst, msg) 65 struct svc_req *rqst; 66 struct rpc_msg *msg; 67 { 68 enum auth_stat stat; 69 XDR xdrs; 70 struct authunix_parms *aup; 71 int32_t *buf; 72 struct area { 73 struct authunix_parms area_aup; 74 char area_machname[MAX_MACHINE_NAME+1]; 75 int area_gids[NGRPS]; 76 } *area; 77 u_int auth_len; 78 size_t str_len, gid_len; 79 int i; 80 81 area = (struct area *) rqst->rq_clntcred; 82 aup = &area->area_aup; 83 aup->aup_machname = area->area_machname; 84 aup->aup_gids = area->area_gids; 85 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 86 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 87 buf = XDR_INLINE(&xdrs, auth_len); 88 if (buf != NULL) { 89 aup->aup_time = IXDR_GET_LONG(buf); 90 str_len = (size_t)IXDR_GET_U_LONG(buf); 91 if (str_len > MAX_MACHINE_NAME) { 92 stat = AUTH_BADCRED; 93 goto done; 94 } 95 memmove(aup->aup_machname, buf, str_len); 96 aup->aup_machname[str_len] = 0; 97 str_len = RNDUP(str_len); 98 buf += str_len / sizeof (int32_t); 99 aup->aup_uid = (int)IXDR_GET_LONG(buf); 100 aup->aup_gid = (int)IXDR_GET_LONG(buf); 101 gid_len = (size_t)IXDR_GET_U_LONG(buf); 102 if (gid_len > NGRPS) { 103 stat = AUTH_BADCRED; 104 goto done; 105 } 106 aup->aup_len = gid_len; 107 for (i = 0; i < gid_len; i++) { 108 aup->aup_gids[i] = (int)IXDR_GET_LONG(buf); 109 } 110 /* 111 * five is the smallest unix credentials structure - 112 * timestamp, hostname len (0), uid, gid, and gids len (0). 113 */ 114 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 115 (void) printf("bad auth_len gid %ld str %ld auth %u\n", 116 (long)gid_len, (long)str_len, auth_len); 117 stat = AUTH_BADCRED; 118 goto done; 119 } 120 } else if (! xdr_authunix_parms(&xdrs, aup)) { 121 xdrs.x_op = XDR_FREE; 122 (void)xdr_authunix_parms(&xdrs, aup); 123 stat = AUTH_BADCRED; 124 goto done; 125 } 126 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 127 rqst->rq_xprt->xp_verf.oa_length = 0; 128 stat = AUTH_OK; 129 done: 130 XDR_DESTROY(&xdrs); 131 return (stat); 132 } 133 134 135 /* 136 * Shorthand unix authenticator 137 * Looks up longhand in a cache. 138 */ 139 /*ARGSUSED*/ 140 enum auth_stat 141 _svcauth_short(rqst, msg) 142 struct svc_req *rqst; 143 struct rpc_msg *msg; 144 { 145 return (AUTH_REJECTEDCRED); 146 } 147